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Posted to yarn-issues@hadoop.apache.org by "Feng Yuan (JIRA)" <ji...@apache.org> on 2016/03/19 08:05:33 UTC
[jira] [Updated] (YARN-4336) YARN NodeManager - Container
Initialization - Excessive load on NSS/LDAP
[ https://issues.apache.org/jira/browse/YARN-4336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Feng Yuan updated YARN-4336:
----------------------------
Description:
Hi folks after performing some debug for our Unix Engineering and Active Directory teams it was discovered that on YARN Container Initialization a call via Hadoop Common AccessControlList.java:
for(String group: ugi.getGroupNames()) {
if (groups.contains(group)) {
return true;
}
}
Unfortunately with the security call to check access on "appattempt_XXXXXXXXXXXXX_XXXXX_XXXXX" will always return false but will make unnecessary calls to NameSwitch service on linux which will call things like SSSD/Quest VASD which will then initiate LDAP calls looking for non existent userid's causing excessive load on LDAP.
For now our tactical work around is as follows:
Example of VASD Debug log showing the lookups for one task attempt 32 of them:
{code}
/**
* Checks if a user represented by the provided {@link UserGroupInformation}
* is a member of the Access Control List
* @param ugi UserGroupInformation to check if contained in the ACL
* @return true if ugi is member of the list
*/
public final boolean isUserInList(UserGroupInformation ugi) {
if (allAllowed || users.contains(ugi.getShortUserName())) {
return true;
} else {
String patternString = "^appattempt_\\d+_\\d+_\\d+$";
Pattern pattern = Pattern.compile(patternString);
Matcher matcher = pattern.matcher(ugi.getShortUserName());
boolean matches = matcher.matches();
if (matches) {
LOG.debug("Bailing !! AppAttempt Matches DONOT call UGI FOR GROUPS!!");;
return false;
}
for(String group: ugi.getGroupNames()) {
if (groups.contains(group)) {
return true;
}
}
}
return false;
}
public boolean isUserAllowed(UserGroupInformation ugi) {
return isUserInList(ugi);
}{code}
One task:
Oct 30 22:55:43 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:55:43 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:55:43 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:55:43 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:15 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:15 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:15 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:15 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:45 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:45 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:45 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:45 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:18 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:18 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:18 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:18 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:49 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:49 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:49 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:49 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:22 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:22 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:22 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:22 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:52 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:52 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:52 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:52 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:59:30 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:59:30 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:59:30 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:59:30 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
was:
Hi folks after performing some debug for our Unix Engineering and Active Directory teams it was discovered that on YARN Container Initialization a call via Hadoop Common AccessControlList.java:
for(String group: ugi.getGroupNames()) {
if (groups.contains(group)) {
return true;
}
}
Unfortunately with the security call to check access on "appattempt_XXXXXXXXXXXXX_XXXXX_XXXXX" will always return false but will make unnecessary calls to NameSwitch service on linux which will call things like SSSD/Quest VASD which will then initiate LDAP calls looking for non existent userid's causing excessive load on LDAP.
For now our tactical work around is as follows:
/**
* Checks if a user represented by the provided {@link UserGroupInformation}
* is a member of the Access Control List
* @param ugi UserGroupInformation to check if contained in the ACL
* @return true if ugi is member of the list
*/
public final boolean isUserInList(UserGroupInformation ugi) {
if (allAllowed || users.contains(ugi.getShortUserName())) {
return true;
} else {
String patternString = "^appattempt_\\d+_\\d+_\\d+$";
Pattern pattern = Pattern.compile(patternString);
Matcher matcher = pattern.matcher(ugi.getShortUserName());
boolean matches = matcher.matches();
if (matches) {
LOG.debug("Bailing !! AppAttempt Matches DONOT call UGI FOR GROUPS!!");;
return false;
}
for(String group: ugi.getGroupNames()) {
if (groups.contains(group)) {
return true;
}
}
}
return false;
}
public boolean isUserAllowed(UserGroupInformation ugi) {
return isUserInList(ugi);
}
Example of VASD Debug log showing the lookups for one task attempt 32 of them:
One task:
Oct 30 22:55:43 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:55:43 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:55:43 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:55:43 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:15 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:15 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:15 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:15 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:45 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:45 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:56:45 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:56:45 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:18 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:18 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:18 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:18 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:49 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:49 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:57:49 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:57:49 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:22 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:22 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:22 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:22 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:52 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:52 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:58:52 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:58:52 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:59:30 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:59:30 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
Oct 30 22:59:30 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
Oct 30 22:59:30 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> YARN NodeManager - Container Initialization - Excessive load on NSS/LDAP
> ------------------------------------------------------------------------
>
> Key: YARN-4336
> URL: https://issues.apache.org/jira/browse/YARN-4336
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.6.0, 2.7.0, 2.6.1, 2.7.1
> Environment: NSS w/ SSSD or Dell/Quest - VASD
> Reporter: Greg Senia
> Assignee: Greg Senia
> Attachments: tactical_defense.patch
>
>
> Hi folks after performing some debug for our Unix Engineering and Active Directory teams it was discovered that on YARN Container Initialization a call via Hadoop Common AccessControlList.java:
> for(String group: ugi.getGroupNames()) {
> if (groups.contains(group)) {
> return true;
> }
> }
> Unfortunately with the security call to check access on "appattempt_XXXXXXXXXXXXX_XXXXX_XXXXX" will always return false but will make unnecessary calls to NameSwitch service on linux which will call things like SSSD/Quest VASD which will then initiate LDAP calls looking for non existent userid's causing excessive load on LDAP.
> For now our tactical work around is as follows:
> Example of VASD Debug log showing the lookups for one task attempt 32 of them:
> {code}
> /**
> * Checks if a user represented by the provided {@link UserGroupInformation}
> * is a member of the Access Control List
> * @param ugi UserGroupInformation to check if contained in the ACL
> * @return true if ugi is member of the list
> */
> public final boolean isUserInList(UserGroupInformation ugi) {
> if (allAllowed || users.contains(ugi.getShortUserName())) {
> return true;
> } else {
> String patternString = "^appattempt_\\d+_\\d+_\\d+$";
> Pattern pattern = Pattern.compile(patternString);
> Matcher matcher = pattern.matcher(ugi.getShortUserName());
> boolean matches = matcher.matches();
> if (matches) {
> LOG.debug("Bailing !! AppAttempt Matches DONOT call UGI FOR GROUPS!!");;
> return false;
> }
>
>
> for(String group: ugi.getGroupNames()) {
> if (groups.contains(group)) {
> return true;
> }
> }
> }
> return false;
> }
> public boolean isUserAllowed(UserGroupInformation ugi) {
> return isUserInList(ugi);
> }{code}
> One task:
> Oct 30 22:55:43 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:55:43 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:55:43 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:55:43 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:56:15 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:56:15 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:56:15 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:56:15 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:56:45 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:56:45 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:56:45 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:56:45 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:57:18 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:57:18 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:57:18 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:57:18 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:57:49 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:57:49 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:57:49 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:57:49 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:58:22 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:58:22 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:58:22 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:58:22 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:58:52 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:58:52 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:58:52 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:58:52 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:59:30 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:59:30 xhadoopm5d vasd[20741]: _vasug_user_namesearch_gc: searching GC for host service domain EXNSD.EXA.EXAMPLE.COM with filter (&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))
> Oct 30 22:59:30 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
> Oct 30 22:59:30 xhadoopm5d vasd[20741]: libvas_attrs_find_uri: Searching <GC...@EXNSD.EXA.EXAMPLE.COM> with filter=<(&(objectCategory=Person)(samaccountname=appattempt_1446145939879_0022_000001))>, base=<>, scope=<sub>
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